Investor Presentaiton

Year-Over-Year Total Energy Mix¹ Comparison 2020 Total Energy Mix Renewables Coal 15% 17% Nuclear 17% Natural Gas 51% 2021 Total Energy Mix Renewables 15% Coal 21% Nuclear 16% Natural Gas 48% ¹Energy mix represents all of the energy used to serve retail and wholesale customers. This energy mix includes resources under the direct financial control of Southern Company subsidiaries, as well as energy purchased from others. It is not meant to represent delivered energy mix to any particular retail customer or class of customers. The renewables category represented in the charts above includes wind, solar, hydro, biomass and landfill gas facilities, whether owned by Southern Company subsidiaries or by third parties and whether Southern Company subsidiaries have the rights to the renewable energy credits (RECs) associated with energy from those facilities. To the extent Southern Company subsidiaries or affiliates retain or receive the RECS associated with energy from the facilities, they generally reserve the right to use those RECs to serve customers with renewable energy or to sell the RECS, either bundled with energy or separately, to third parties. 21

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